diff --git a/src/Janus/OpenSsl/Certificate.php b/src/Janus/OpenSsl/Certificate.php
index f6d20b9..10badcf 100644
--- a/src/Janus/OpenSsl/Certificate.php
+++ b/src/Janus/OpenSsl/Certificate.php
@@ -103,6 +103,9 @@ public function getIssuerDn()
     {
         $dnParts = array();
         foreach ($this->_parsed['issuer'] as $key => $value) {
+            if (is_array($value)) {
+                $value = implode("\n", $value);
+            }
             $dnParts []= "/$key=$value";
         }